src/mainboard/compulab/intense_pc/early_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <stdint.h>
   5 #include <arch/io.h>
   6 #include <superio/smsc/sio1007/sio1007.h>
   7
   8 #define SIO_PORT 0x164e
   9
  10 void bootblock_mainboard_early_init(void)
  11 {
  12         const u16 port = SIO_PORT;
  13         const u16 runtime_port = 0x180;
  14
  15         /* Enable COM1 if requested */
  16         if (CONFIG(DRIVERS_UART_8250IO))
  17                 sio1007_enable_uart_at(port);
  18
  19         /* Turn on configuration mode. */
  20         outb(0x55, port);
  21
  22         /* Set the GPIO direction, polarity, and type. */
  23         sio1007_setreg(port, 0x31, 1 << 0, 1 << 0);
  24         sio1007_setreg(port, 0x32, 0 << 0, 1 << 0);
  25         sio1007_setreg(port, 0x33, 0 << 0, 1 << 0);
  26
  27         /* Set the base address for the runtime register block. */
  28         sio1007_setreg(port, 0x30, runtime_port >> 4, 0xff);
  29         sio1007_setreg(port, 0x21, runtime_port >> 12, 0xff);
  30
  31         /* Turn on address decoding for it. */
  32         sio1007_setreg(port, 0x3a, 1 << 1, 1 << 1);
  33
  34         /* Set the value of GPIO 10 by changing GP1, bit 0. */
  35         u8 byte;
  36         byte = inb(runtime_port + 0xc);
  37         byte |= (1 << 0);
  38         outb(byte, runtime_port + 0xc);
  39
  40         /* Turn off address decoding for it. */
  41         sio1007_setreg(port, 0x3a, 0 << 1, 1 << 1);
  42
  43         /* Turn off configuration mode. */
  44         outb(0xaa, port);
  45 }